Artículo
Osmotic dehydration of apple: Influence of sugar and water activity on tissue structure, rheological properties and water mobility
Nieto, Andrea Bibiana
; Vicente, Sebastián; Hodara, Karina; Castro, Maria Ana
; Alzamora, Stella Maris
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Fecha de publicación:
11/2013
Editorial:
Elsevier
Revista:
Journal Of Food Engineering
ISSN:
0260-8774
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Osmotic dehydration of apple tissue (Malus pumila, Granny Smith cultivar) to water activity (aw) 0.97 or 0.94 with maltose or maltose syrup solutions was studied and compared with previous results using glucose or trehalose as humectants. Structure (optical and transmission electronic microscopy observations), rheological properties (small scale dynamic oscillatory and creep/recovery measurements and large scale compression force-deformation testing), and water mobility (1H NMR spectra) of parenchymatous apple tissue were significantly affected by osmotic treatments. Osmotically dehydrated apples became soft and extensible and lost crispness and hardness, while the behavior of the moduli G′ and G″ indicated weaker gels after osmosis. Compression properties of the tissues abruptly changed after osmotic dehydration to aw 0.97, while reduction to aw 0.94 led to a compression response more similar to that of untreated apples. Compression behavior and state and distribution of water in apple tissues were influenced by the osmotic agent employed and the aw level, while in general mechanical spectra and creep analysis were not able for distinguishing physical differences between osmotic treatments assayed.
Palabras clave:
Apple
,
Osmosis
,
Sugars
,
Water Mobility
,
Rheology
,
Structure
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Identificadores
Colecciones
Articulos(OCA CIUDAD UNIVERSITARIA)
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Articulos de OFICINA DE COORDINACION ADMINISTRATIVA CIUDAD UNIVERSITARIA
Citación
Nieto, Andrea Bibiana; Vicente, Sebastián; Hodara, Karina; Castro, Maria Ana; Alzamora, Stella Maris; Osmotic dehydration of apple: Influence of sugar and water activity on tissue structure, rheological properties and water mobility; Elsevier; Journal Of Food Engineering; 119; 1; 11-2013; 104-114
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